The effects of N, P and crude oil on the decomposition of Spartina alterniflora belowground biomass
| Autor: | James E. Bodker, R. Eugene Turner |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
0106 biological sciences
chemistry.chemical_classification geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences biology Chemistry 010604 marine biology & hydrobiology Phosphorus Biomass chemistry.chemical_element Aquatic Science Management Monitoring Policy and Law Spartina alterniflora biology.organism_classification 01 natural sciences Nutrient Agronomy Salt marsh Soil water Soil horizon Organic matter Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences |
| Zdroj: | Wetlands Ecology and Management. 24(3):373-380 |
| ISSN: | 0923-4861 |
| DOI: | 10.1007/s11273-015-9457-8 |
| Popis: | We conducted a laboratory experiment to examine how the decomposition of particulate belowground organic matter from a salt marsh is enhanced, or not, by different mixtures of crude oil, nitrogen (N), or phosphorus (P) acting individually or synergistically. The experiment was conducted in 3.8 L sampling chambers producing varying quantities of gas whose volume was used as a surrogate measure of organic decomposition under anaerobic conditions. Gas production after 28 days, from highest to lowest, was +NP = +N >>> +P, or +oil. The gas production under either +P or +oil conditions was indistinguishable from gas production in the control chamber. Nitrogen, not phosphorus, or +NP, was the dominant factor controlling organic decomposition rates in these experiments. The implication for organic salt marsh soils is that shoreline erosion is enhanced by salt marsh oiling, presumably by its toxicity, but not by its effect on the decomposition rates of plant biomass belowground. Nutrient additions, on the other hand, may compromise the soil strength, creating a stronger disparity in soil strength between upper and lower soil layers leading to marsh loss. Nutrient amendments intended to decrease oil concentration in the marsh may not have the desired effect, and are likely to decrease soil strength, thereby enhancing marsh-to-water conversions in organic salt marsh soils. |
| Databáze: | OpenAIRE |
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